侧柏、山毛桃单栽及侧柏-山毛桃混栽幼苗根际土壤环境特征

发布时间：2018-07-20 15:32

【摘要】：侧柏(Platycladus orientalis)和山毛桃(Prunus davidiana)均属太行山地区植被恢复的先锋树种。以侧柏和山毛桃幼苗为研究对象,利用盆栽试验比较不同种植模式(侧柏单栽、山毛桃单栽和侧柏-山毛桃混栽)对根际土壤养分状况和微生物数量特征的影响。结果表明,山毛桃单栽和侧柏-山毛桃混栽显著降低了根际土壤pH(p0.05),提高了土壤养分的有效性。相对单栽,混栽种植显著提高了根际土壤有机质、全氮和速效钾的含量(p0.05)。单栽及混栽种植均在一定程度上提高了根际区土壤速效磷含量,但并未造成显著性差异(p0.05)。通过分析根际微生物数量发现,侧柏-山毛桃混栽显著提高了根际土壤细菌和放线菌的数量,显著降低了根际土壤真菌的数量(p0.05),而山毛桃单栽则显著提高了根际土壤放线菌和真菌的数量(p0.05)。综合分析表明混栽幼苗能有效改善根际土壤养分状况和微生物活性,因而,侧柏纯林引种山毛桃可作为防止土壤退化的一种有效措施。
[Abstract]:Platycladus orientalis and Prunus davidiana are the pioneer species of vegetation restoration in Taihang Mountains. The effects of different planting patterns (single planting of Platycladus orientalis, monoculture of Platycladus orientalis and mixed cultivation of Platycladus orientalis) on soil nutrient status and microbial quantitative characteristics in rhizosphere were studied by pot experiment. The results showed that the soil pH (p0.05) was significantly decreased and the availability of soil nutrients was improved by single cultivation of Shanmao Peach and mixed cultivation of Platycladus orientalis and Shanmao Peach. Compared with single planting, the content of organic matter, total nitrogen and available potassium in rhizosphere soil was significantly increased by mixed planting (p0.05). Both single and mixed planting increased the content of available phosphorus in rhizosphere soil to some extent, but did not cause significant difference (p0.05). By analyzing the number of rhizosphere microbes, it was found that the mixed cultivation of Platycladus orientalis and Peach significantly increased the number of bacteria and actinomycetes in rhizosphere soil. The number of fungi in rhizosphere soil was significantly decreased (p0.05), while the number of actinomycetes and fungi in rhizosphere soil was significantly increased (p0.05). The comprehensive analysis showed that the mixed seedlings could effectively improve the soil nutrient status and microbial activity in rhizosphere. Therefore, the introduction of Platycladus orientalis into pure forest could be used as an effective measure to prevent soil degradation.
【作者单位】：河南农业大学林学院;
【基金】：国家自然科学基金(31170580) 河南省博士后科研基金河南农业大学科技创新基金教育部2011年高等学校博士学科点专项科研基金联合课题“植被恢复初期侧柏-山毛桃群落种间促进作用机制”(2011410511000)
【分类号】：S714

【共引文献】